User Manual

Qualifying Cabling with the Autotest

Tip: To determine if a fault is caused by a crosstalk or

impedance problem, use the Find Crosstalk Fault and

Find Impedance Fault functions in Diagnostic (DIAG)

mode.

• Fault detected: A localized impedance fault was

detected. Localized faults are usually caused by bad

connections. Check the cabling at the location given.

See the Appendix for other causes of impedance faults.

• Fault at connection to tester: The plug connected to the

tester is bad, or the tester’s connector is damaged.

• Insertion loss fault: The cabling’s attenuation is too

high. See the Appendix for causes of insertion loss

problems.

• 1000BASE-T bandwidth fault: The cable has high

ELFEXT (equal-level far-end crosstalk). This may be

caused by poor-quality cable or connecting hardware.

See the Appendix for other causes of ELFEXT faults.

Figure 11. Signal Performance Results (cont.)